✅longer-lasting force in closed, short, and long filaments. It has thinner facial-lingual dimension and is an excellent match for double tying wire ligatures on either Mini Master Series brackets or Low Profile Series brackets. ✅More Colors Stamped from thermoplastic medical grade polyurethane. ✅High elasticity and excellent rebound that provides continuous force. ✅Coordinate the power chain color with the ligature tie color. ✅Orthodontic Braces Rubber Chains, Braces Power Chains consisted force in closed, short, long filaments chain in 15’(4.6m) spools LA MIERE 1 Roll Orthodontic Rubber Chains, Braces Power Chains consisted force in closed, short, long 15''spools (closed, 0.113’’(2.5mm), Green & Cyan)